Foraging observations of Reepenia bituberculata and Meroglossa species. The bar shows night (purple) and day (yellow) with sunrise and sunset indicated above by longest vertical lines and civil (sun 6° below horizon), nautical (sun 12° below horizon) and astronomical (sun 18° below horizon) start and end shown by the lines decreasing in height to the left and right of sunrise and sunset, respectively. Numbers along the bottom of the bar indicate times of day. Thick horizontal black and red lines show when R. bituberculata and Meroglossa spp., respectively, were collected or observed to be active. Thinner solid lines show frequent observation periods (observed at least every 10 mins) when no bees were observed or caught on flowers, while dotted lines indicate sporadic observation periods (observed every hour or more) when no bees were observed or caught on flowers.